WHAT DO I DO [and please nothin sick]
Come on 100 years old home it's a luxury for the history museum.
pickme is on the right trackWarm air holds more moisture than cold airWhat's happening is a like a glass that has a cold drink in itThe moisture in the warm interior air is condensing on the cold wallsInsulating walls attics would be the first step, and will probably solve the problem (as well as lowering your heating bills).
if your dropping heat to save money this may be problem the warmer the air the more moister it holds the colder the temp is in the house the moisture will collect on the walls also make sure you have a fan that vents to outside in both the bathroom and kitchen i would make sure the attic is insulated heat rises I would do the walls as a last resort
I would look for a water leak somewhere in the homeNormally, running a heater will dehumidify the homeAs the temperature inside rises (in comparison to the outside temperature) the relative humidity in the house falls For example, if the temperature outside is 40 degrees and the humidity is 60%, inside a 72 degree house the humidity will be only 19%, which is very dryConsider buying a humidistat and monitor the humidity in your homeIf it is constantly high (over 40%-50%) regardless of running the heater or A/C there is probably another issue in the house.
